On the lock screen, drag an app or folder icon up to unlock the screen and directly go to the app or folder.
Tip: The shortcuts on the lock screen are the same ones on your Home screen's launch bar. To change the lock screen shortcuts, replace the apps or folders on the launch bar.
If you've set up another security layer like a screen lock pattern or PIN, you'll be asked to provide your credentials first before
HTC One A9s opens the app or folder.